3d printing a rotor out of PLA and using the lost PLA method to metal cast it in aluminum. This was the first time I had tried lost PLA and it turned out great. Now I typically use Machinable Wax's Print2Cast wax filament for my casting due to its low temperature and clean burn out. See the link below if your interested.

********************3d printing Filament************************

Machinable Wax Print2Cast Filament: Uses "PROJECT" at check out for 10% off your order.
https://goo.gl/2S9vRB

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**************3D printed Castings Videos************************

Dragon Eggs:
   • Casting Brass Game of Thrones Dragon ...  

Bronze Dagger:
   • Video  

Game of Thrones, House of Stark Sigil:
   • Video  

Skyrim Emblem:
   • Video  

Pirates of the Caribbean Coins:
   • Cast Pirate Coins at Home!  

Avengers Logo:
   • Video  

Fidget Spinner:
   • Video  

Mothers Day-Mom of the Year Award:
   • Casting Brass  Mother's Day Mom of th...  

Raven Skull Statue:
   • Video  

Lattice Cube:
   • 3D Printing to Metal Casting/Lost PLA...  

Wind Generator Rotor:
   • 3D Printing to Metal Casting/Lost PLA